I used to do some pretty extensive island hopping towing a sled with tents and water and food etc behind me.
Your feet get so bloody sore after several hours of hitting chop I haven't looked at the distances your talking but from memory my calculation was something like 30 minutes for 15kms on one tack ? But the bottleneck/crux was my feet even with proper heat molded ronix1 boots
Maybe foils have solved this problem but I really couldn't be asked with riding any further away from a beach then it takes me to crawl back to my vehicle in the event I break something again
Good luck and if your tieing waterproof bags around your body etc just be sure you try them out first in a pool if you can because I had the wind drop a few times on me and the bags would float I would sink and therefore the bags straps would literally choke me out around my neck
So yeah practice runs are crucial and don't give into the little voices telling you to do tricks when your 50kms offshore
